React Testing & QA Specialist Mock Test

Q: What is this reactjs mock test?

This is a comprehensive reactjs mock test with 10 questions covering Testing Philosophy, Queries, Async Testing. It simulates real technical interviews with timed conditions and provides detailed explanations.

Q: How long does the test take?

The test has a time limit of 60 minutes. You can pause and resume, but we recommend completing it in one sitting.

Q: Will I get feedback on my answers?

Yes! After each question, you receive immediate feedback with detailed explanations. At the end, you get a comprehensive report showing your strengths and areas for improvement.

Q: Is this test suitable for FAANG interview preparation?

Absolutely! Our questions are curated by FAANG interviewers and cover the exact topics and difficulty levels you'll encounter in top tech company interviews.

Question 1

What is the primary philosophy of React Testing Library (RTL)?

Answer

To test components in a way that resembles how a user interacts with them

Question 2

Which RTL query should be your first choice for finding an input field according to best practices?

Answer

getByRole

Question 3

What is the difference between `queryBy...` and `getBy...` in React Testing Library?

Answer

getBy throws an error if the element is not found; queryBy returns null

Question 4

How do you handle testing a component that performs an asynchronous API call on mount?

Answer

Use `findBy...` queries which return a promise and retry until the element appears

Question 5

In Jest/Vitest, what is a 'Mock' function used for?

Answer

To simulate a function and track calls, arguments, and return values

Question 6

Which tool is specifically designed for 'End-to-End' (E2E) testing of a React application in a re...

Answer

Playwright

Question 7

What is the purpose of the `act()` utility in React testing?

Answer

To ensure all updates (state, effects) are processed and applied to the DOM before making assertions

Question 8

What is 'Regression Testing'?

Answer

Re-running existing tests to ensure new changes haven't broken current functionality

Question 9

When using `fireEvent` vs `user-event` library, why is `user-event` generally preferred?

Answer

It more accurately dispatches multiple events (like mouseover, mousedown, mouseup) to better simulate real interaction

Question 10

What is the 'Testing Pyramid' recommendation for a React app?

Answer

Mostly Unit and Integration tests, with fewer E2E tests

React Testing & QA Specialist Mock Test

Difficulty

Topics Covered

What You'll Get